I have a mirror mounted on my handlebars, not a helmet or glasses mirror. Those don't work for me at all. I have an old NiteRider TrailRat headlight that is pretty bright, but I have no interest in night riding.
I really sucked at crits. Partly because I was often the only woman in the field (very few women's races back then) and that was pretty intimidating. I mean, I don't think I was ever dead last, but I was rarely in the top half and had my share of DNFs. It was also partly because of my eye, but at 19 or 20, I wasn't too keen on acknowledging that.